1. Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
2. Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois 60612, United States
3. Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
4. Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States